Category: Chemical Environmental Engineering

Pick out the wrong statement ?

Chemical Environmental Engineering 31/10/2020
0

A. Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its
chemical oxygen demand (C.O.D.) value
B. Environmental pollution by NOx emission is much higher by four stroke petrol engines as
compared to the two stroke engines
C. Temperature in stratosphere rises with increasing altitude
D. The characteristic of a green house body is that it allows the long wavelength incoming solar
radiation to come in but does not allow the short wavelength infra red radiation to escape out
of the earth’s atmosphere

Pick out the wrong statement?

Chemical Environmental Engineering 27/10/2020
0

A. Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in
exhaust emissions
B. Inhalation of pollutant carbon monoxide results in death by asphyxiation
C. Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles
D. Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in
atmosphere